C02F 3/18
The aerator having a horizontal axis
Official title: the aerator having a horizontal axis
C02F3/18 (The aerator having a horizontal axis) appears on 42 US grants and 8 published applications in this corpus.
Search patents in C02F- Granted patents
- 42
- Published applications
- 8
- Assignees
- 26
- Inventors
- 63
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aerator10 Feb 2026US 12,545,609 B2Patrick Charles Pty Ltd
- Container-type apparatus with a suspended particle system for wastewater treatment10 Dec 2024US 12,161,953 B2Wesdon-Tienda Environmental Sciences Co. Ltd.
- Aeration discs and methods for using same14 Jan 2020US 10,532,940 B2Evoqua Water Technologies LLC
- Apparatus for mixing gasses and liquids3 Apr 2012US 8,146,895 B2
- Method and apparatus for water treatment10 Nov 2009US 7,615,147 B1
- An aerator24 Nov 2022US 2022/0371931 A1Patrick Charles Pty Ltd
- Systems and methods for water and solids treatment18 Feb 2021US 2021/0047214 A1Blue Frog Technologies LLC
- Container-type apparatus with a suspended particle system for wastewater treatment22 Oct 2020US 2020/0330902 A1Wesdon-Tienda Environmental Sciences Co. Ltd.
- Container-type apparatus with a suspended particle system for wastewater treatment4 Oct 2018US 2018/0280835 A1Wesdon-Tienda Environmental Sciences Co. Ltd.
- Aeration Discs and Methods For Using Same26 Apr 2018US 2018/0111862 A1Evoqua Water Technologies LLC
Most cited
By later US patents
- Process for treating BOD-containing wastewater84US 6,592,762 B2United States Filter Corporation · 2003
- Device and process for liquid treatment76US 5,948,326 ABattelle Memorial Institute · 1999
- Centrifugal rotating disc assembly for biological waste water treatment apparatus56US 4,268,385 ADengyosha Engineering Co., Inc. · 1981
- Rotating biologic aquarium filter system35US 5,423,978 AAquaria, Inc. · 1995
- Paddlewheel aerator drive mechanism30US 5,116,501 AHouse Manufacturing, Inc. · 1992